Cotes C35 - Page 38

COTES C35 OPERATING AND SERVICE HANDBOOK page 38/71
d) If the dehumidifier starts up as described above, then go to e)
If the dehumidifier does not start, you should check the humidity set point (Configuration-B,
Configuration-C and Configuration-D only). If set point is higher than measured by the humidity
sensor, the dehumidifier will not start (unless the “Always On” program has been chosen – see
below).
e) Once the dehumidifier is operating, you should adjust the air flows
If a Cotes HR or LK module is installed, go to SECTION 7 / Condensation or heat recovery unit.
Configuration-A
• Adjust the regeneration air until the incoming air flow matches the nominal values given
under SECTION 3 / TECHNICAL DETAILS > Specifications. Check the air flows using a
suitable instrument (pitot pipe/thermo-anemometer or similar) in the duct.
• Check the temperature after the heating elements. The temperature in the regeneration box
is shown on the LCD display inside the electrical box. Make sure your C35 unit is fully
heated before taking the readings.
• The temperature increase should be approximately +95°C, and must not exceed 125°C. In
cases where it is hard to access the regeneration flow, the temperature increase alone can
be used to adjust the flow rate. Be aware that the maximum temperature will occur when
outdoor temperatures are highest. If exceptionally high ambient temperatures are expected
(>30°C), the aim should be a temperature increase of less than 95°C. The temperature
increase can be reduced by increasing the regeneration flow rate. The temperature must be
kept lower than 125°C to avoid causing damage to the switch that regulates the heater. If
this temperature is too high, please consult Cotes or your local dealer.
Configuration-B
• Adjust the regeneration air fan speed on the PLC until the incoming air flow matches the
nominal value given under SECTION 3 / TECHNICAL DETAILS > Specifications. Check the
air flows using a suitable instrument (pitot pipe/thermo-anemometer or similar) in the duct.
• Check the temperature after the heating elements. The temperature in the regeneration
system is shown on the PLC display at the front of the dehumidifier. Make sure your C35
unit is fully heated before taking the readings.
NOTE
The nominal figures are based on operation at 20°C. If the air temperature differentiates
significantly from this, the flow rate should be corrected for another density.
For example, if the air flow rate is measured in the regeneration outlet, the volumetric flow
rate of air must be 10–15% higher than the nominal value, due to the lower density of warm
air.